Importance of the blue fin tuna

If the blue- fin tuna were fished to extinction, then the mackerel and other fish wouldn’t have any predators therefore there would be to many of them and then all of other animals wouldn’t have any food because the Blue Fin would be extinct. Also fisher men rely on the Blue Fin to make their money so they could supply food and shelter for their families. Also a lot of people rely on the Blue Fin for their food and if there aren’t any Blue Fins they can’t eat. That is why the Blue. Fin Tuna is so important.

Threats to the Blue- fin Tuna
· Overfishing in the Mediterranean Sea is bringing the blue-fin tuna closer to extinction.
· People are killing many blue-fin tuna every day.
· In the 1970s, the Japanese started fishing for the tuna and made sushi.
· People are now tracking the tuna with special technology to find out their migration patterns and homes.

Conservation Plans
These ideas could be made into laws to help the Blue Fin Tuna.
1. Prevent fishing over 1 ton of tuna a day. If they fish over the limit, they should be fined. The money could go to a fish hatchery for the tuna.
2. Make special and expensive fishing licenses specifically for the blue fin tuna.
3. Raise the costs of tuna at restaurants.

A biotic Factors
The top layer of the oceans is full of sunlight during the daytime. This ocean layer is called the sunlit zone. The depth of this zone depends on the clarity or murkiness of the water. In dirty water, it can be only 50 feet deep. On average, it’s as deep as 660 feet. The depth of the ocean averages about 13,000 feet. The temperature in this zone ranges from 27 to 104 degrees F. In this zone, there is enough light for photosynthesis to happen. Photosynthesis is a process in which food is made indirectly from the sun which is important for sea animals. The photosynthesis from the oceans makes up 90% of the Earth’s oxygen.

Biotic Factors

· Din Flagellates
· Diatoms
· Coccolithophores
· Cyano bacteria
· Plankton
· Small Zooplankton
· Larger Zooplankton
· Dinoflagellates
· Shrimp and krill
· Sardines
· Herring
· Cepholapods
· Seals
· Dolphins
· Pelicans
· Albotross
· Penguins
· Skuas
· Squids
· Sharks